<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <button id="btn_test">按钮</button>
</body>
</html>
<script>

class Person{
    constructor(x){
        this.x=x;
    }
}

Person.prototype.show= function(){
    console.log(this.x);
}

let person0 = new Person(10);
let person1 = new Person(100);
person0.show();
person1.show();

console.log(Person.prototype===Object.prototype);
</script>